Improvement in mill-picks



UNITED STATES PATENT GFEICE.

FRANK KORTICK, OF MENDOTA, ILLINOIS.

'IMPROVEMENT IN MILL-PICKS.

Specification forming part of Letters Patent No. 127,774, dated J unel1, 1872.

Specification describing a new and useful Improvement in Mill- Pick,invented by FRANK KoRTIoK, 'of Mendota, in the county of La Salle andState of Illinois.

Figure l represents a longitudinal section of my improved mill-pick.Fig. 2 is a detail side View of the holder, showing the pivoted byplacing it between ears, with one end against a step of the rigid jaw,and holding simply by a spring-jaw. Second, it consists in pivoting onejaw so as to swing out laterally. Third, it consists in providingpivoted clamps in the handle, by which the angle of the pick to thehandle may be changed.

A is a spring-jaw, of angular form, and B a rigid jaw, upon which itbears elastically, so as t'o hold the tool iirmly in place. They are tobe held in a handle, D, of suitable kind. The two jaws are united at oneend by a rivet, a, or other means, and are so enlarged or bent in themiddle as to t tight within the handle, and to clamp the cutter securelybetween their open ends. The inner face of the jaw A has a series ofsteps, b b, formed on it, as shown,

against one of which the upper end of the cutterC bears. Projecting earsd d at the sides of one or both of the jaws prevent all side play ordisplacement of the cutter. In a mill-pick of this construction thecutter can be almost totally used up, as it is drawn from one step tothe other as it shortens. The steps may be rounded, as in Fig. 2, orstraight or angular, as may be desired. The jaws can be of malleable orother comparatively soft material, while the cutter will be of steel.

I am aware that pick-blades clamped between the jaws by wedges, or screwand nut, are in public use, but my object is to produce a cheaper andmore easily-adjusted article.

Having thus described my invention, what I claim as new, and desire toprotect by Letters Patent, is-

1. The arrangement of the spring-jaw A upon pivot a at one end, whichholds it to jaw B, but allows it to be moved out laterally, asdescribed.

2. The combination, with angular pick, of the pivoted andadjustableclamps, which-will hold said pick at dierent an gles to thehandle.

FRANK KORTlCK.

Witnesses:

JOHN SHEPLEY, C. W. VAN VLEET.

